first upload & readme update

hamidsamak · Sep 29, 2015 · 4a9a4aa · 4a9a4aa
1 parent c82c763
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diff --git a/LICENSE b/LICENSE
diff --git a/README.md b/README.md
@@ -1,2 +1,10 @@
-# azada
-php web-based proxy
+# Azada
+PHP Web-based Proxy
+
+Azada is a simple example for creating a web proxy.
+
+Features:
+1. Encode URLs using Base64 and ROT13 algorithms.
+2. Ability to submit POST data
+3. Working with cookie based websites.
+
diff --git a/azada.php b/azada.php
@@ -0,0 +1,145 @@
+<?php
+
+/*
+ * Azada 0.1b
+ * php web-based proxy
+ * https://github.com/hamidsamak/azada
+ */
+
+error_reporting(0);
+
+if (isset($_GET['url']) && empty($_GET['url']) === false) {
+	$url = $_GET['url'];
+	$rot13 = isset($_GET['rot13']);
+	$base64 = isset($_GET['base64']);
+
+	if ($rot13)
+		$url = str_rot13($url);
+
+	if ($base64)
+		$url = base64_decode($url);
+
+	if ($data = get_contents($url)) {
+		$data = trim($data);
+
+		$parse = parse_url($url);
+
+		if (substr($data, 0, 1) !== '<') {
+			$format = strtolower(substr($parse['path'], -4));
+
+			switch ($format) {
+				case '.css': header('Content-type: text/css'); break;
+				case '.jpg': header('Content-type: image/jpeg'); break;
+				case '.jpeg': header('Content-type: image/jpeg'); break;
+				case '.png': header('Content-type: image/png'); break;
+			}
+
+			die($data);
+		}
+
+		if (isset($parse['scheme']) === false)
+			$parse['scheme'] = 'http';
+		if (isset($parse['host']) === false)
+			$parse['host'] = $parse['path'];
+
+		$base_url = $parse['scheme'] . '://' . $parse['host'];
+
+		$doc = new DOMDocument();
+
+		$doc->loadHTML($data);
+
+		foreach (array('a' => 'href', 'link' => 'href', 'img' => 'src', 'script' => 'src', 'form' => 'action') as $name => $attribute)
+			foreach ($doc->getElementsByTagName($name) as $link) {
+				$value = $link->getAttribute($attribute);
+
+				$parse = parse_url($value);
+				if (isset($parse['scheme']) === false)
+					$value = $base_url . (substr($value, 0, 1) === '/' ? null : '/') . $value;
+
+				if ($base64)
+					$value = base64_encode($value);
+
+				if ($rot13)
+					$value = str_rot13($value);
+
+				$link->setAttribute($attribute, $_SERVER['PHP_SELF'] . '?url=' . $value . ($base64 ? '&base64=1' : null) . ($rot13 ? '&rot13=1' : null));
+			}
+
+		echo $doc->saveHTML();
+	} else
+		die('<strong>Azada error:</strong> Unreachable host.');
+
+	exit;
+}
+
+if (file_exists(__DIR__ . '/cookie.txt'))
+	unlink('cookie.txt');
+
+echo '<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0"> 
+<title>Azada</title>
+<script type="text/javascript">
+function $(id) {
+	return document.getElementById(id);
+}
+function options() {
+	var url = $("url").value;
+
+	if ($("base64").checked == true)
+		url = window.btoa(url);
+	else
+		$("base64").removeAttribute("name");
+
+	if ($("rot13").checked == true)
+		url = url.replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);});
+	else
+		$("rot13").removeAttribute("name");
+
+	$("form").innerHTML = "<input name=\"url\" type=\"hidden\" value=\"" + url + "\">" + $("form").innerHTML;
+	$("url").removeAttribute("name");
+
+	return true;
+}
+</script>
+</head>
+<body>
+<header><h1>Azada</h1></header>
+<section>
+	<form id="form" method="get" action="' . $_SERVER['PHP_SELF'] . '" onsubmit="return options();">
+	URL: <input id="url" name="url" type="text" value=""> <button type="submit">Browse</button><br>
+	<label><input id="base64" name="base64" type="checkbox" value="1" checked> Base64 encode</label><br>
+	<label><input id="rot13" name="rot13" type="checkbox" value="1" checked> ROT13 encode</label><br>
+	<!--label><input id="new_window" type="checkbox" value="1"> Open in new window</label-->
+	</form>
+</section>
+<br>
+<footer><a href="https://github.com/hamidsamak/azada">Azada 0.1b</a></footer>
+</body>
+</html>';
+
+function get_contents($url) {
+	$ch = curl_init();
+
+	curl_setopt($ch, CURLOPT_URL, $url);
+	curl_setopt($ch, CURLOPT_HEADER, false);
+	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
+	curl_setopt($ch, CURLOPT_COOKIEJAR, __DIR__ . '/cookie.txt');
+	curl_setopt($ch, CURLOPT_COOKIEFILE, __DIR__ . '/cookie.txt');
+
+	if (isset($_POST) && count($_POST) > 0) {
+		curl_setopt($ch, CURLOPT_POST, true);
+		curl_setopt($ch, CURLOPT_POSTFIELDS, $_POST);
+	}
+
+	$data = curl_exec($ch);
+
+	curl_close($ch);
+
+	return $data;
+}
+
+?>